Power-shovel or the like.



D.'J. CAREY.

. POWER SHOVEL OR THE LlKE.

APPLICATION HLED'AUG.24. I916.

Patented Oct. 29,1918.

2 SHEETSSHEEI 1.

v a I I /l Iruven Z 07" jam ale Z I Patented 0012. 29, 1918.

2 SHEETS-SHEEI 2.

J. CAREY. POWER SHOVEL OR THE LIKE. APPLICATION FILED Aue.24, 1

DANIEL J. CAREY, or nnsoiv, ALBERTA, CANADA.

POWER-SHOVEL OR THE LIKE Specification of Letters Patent. gm1; gnted[ 129 1918 Application filed August 24, .1916. Serial No. 116,647.

To all whom/it may concern:

Be it known that I, DANIEL J. CAREY, a

subject of the King of Great Britain and Ireland, residing at Edson, inthe Province of Alberta and Dominion of Canada, have.

invented new and useful Improvements in Power-Shovels or the like, ofwhich the followingis a specification.

In devices of this kind in common use,

I am aware of none which employs an oscillating dipper arm, capable ofadjustment lengthwise of the boom or support and also adapted to beshifted longitudinally in its oscillatory mounting on said support. Mypresent invention embodies such a dipper arm and simple mechanismassociated therewith, whereby the dipper may be operated quickly andeasily.

The object of my invention is to provide means in devices of this kindwhereby the, range and capacity thereof are simply and economicallyincreased.

More particularly, its object is to provide in adevice of this nature amounting for a dipper arm capable of longitudinal movement upon asupport, and power operated means adapted to shift said dipper armlongitudinally to any position of its adjustment on said support.

In the drawings, Figure 1 is a side elevation of a ower shovel embodyingmy invention; Fig. 2 is a perspective view showing in detail theconstruction of the boom, the dipper arm and carriage therefor and thearrangement of cables to shift said arm in said carriage; Fig. 3 is adetail planview of the carriage; and Fig. 4 is a sectional view takenonthe line 44 of Fig. 3.

Referring to the drawings,- I have used the reference numeral 10 toindicate the bed of the shovel, which may be mounted upon a truck 11 orother suitable device. A boom A, tiltably mounted upon the bed' 10, issupplied with a supporting cable 13 wound upon a drum 14 on the'bed 10.Said boom comprises two spaced channeled beams 15 arranged side by sideand having the flanges 16 thereof turned outward. Guides 17 secured toand overlapping said flanges 16 slidably receive a carriage B upon whicha dipper armor handle 18 is mounted. Said carriage B is made up ofspaced beams 19 and 20 joined at their endsby cross-pieces 21, thelongitudinal edges of the outer beams 19 being adapted to slide upon the1 guides 17 of the boom A. shaft 22 (dotted lines Figs. 3 and 4) passestranscarriage B. a sleeve 23, square in cross-section, having a bearing24 upon the shaft 22, .to tiltably support said sleeve. The dipper arm18 fits loosely in saidsleeve 23 and is capable of longitudinal movementtherein. A dipper, bucket or other receptacle 18 is at"- tached to thelower end of said dipper arm 18 and ordinary hoisting tackle for saiddipper is provided, which may include a cable 25 and winding drum 26therefor.

I supply suitable means for sliding the carriage B from one end oftheboom A to the other and these means, as shown, consist of a windingdrum 27 and two cables 28 and 29 wbund in opposite directions on saiddrum. The cable 28 passes over an idler sheave 28, then under a secondidler sheave 30 and is attached to an eye 31 on one end of the carriage,while the other cable 29 passes under an idler sheave 32, then over asecond idler sheave 33 and is connected to a second eye 34 on theyotherend of said carriage.

I also provide means to move and secure the dipper arm 18 in the sleeve23 in all positions of the carriage B, said means being adapted tocompensate for the movement of the carriage. .Two cables, 35 and 36, arewound in opposite directions upon a drum 37. The cable 35 passes fromsaid drum over an idler sheave 38 near the pivotal mounting of the boomA, thence under a sheave 39 on the carriage B, thence upward over asheave 40 on the upper end of the dipper arm 18, thence downward beneatha second sheave 41 on the carriage, thence to apoint 42 at the outer endof the boom A, where it is securely attached. The second cable 36 passesfrom the drum 37 beneath an idler sheave 43, thence over a sheave 44 onthe carriage, thence downward around a sheave 45 on the lower end of thedipper arm 18, thence up ward over a second sheave 46 on said carriageand thence to said point 42 near the outer end of the boom A, where itis also secured. Rotation of'the winding drum 37 in either directiontakes up one of the cables- 44 and 46 roll upon the cables 35 and 36with out altering the position of the dipper arm 18 when the carriage Bis shifted upon the boom A. Thus it will be seen that the longitudinaladjustment of the dipper arm 'heed not be disturbed, when the carriageis moved,

and that said arm can be shiftedlongitudi nally by rotatingthe drum 37in any position thus facilitates access to loading and dis? chargingpositions, and also the crowding of the dipper 24; into the work.

Having described my invention, what I 'claim as new and desire toprotect by Let ters Patent, is:

1. In a device of the class described, a boom or other support, acarriage slidable longitudinally onsaid support, a transverse shaft insaid carriage, a sleeve pivotally mounted on said shaft, sheavesrevoluble on said shaft and located upon opposite sides of said sleeve,a dipper arm slidable in the I sleeve, a sheave at each end ofsaiddipper arm, means to move the carriage on said support, a pair ofcables, each of which is attached to the boom and extends over a sheaveon said shaft and one of said sheaves on the dipper arm, and means towind in and pay out said cables, whereby said dipper arm may be shiftedlongitudinally from any position of the carriage.

2, In a devi e of the class described, a boom or other support, acarriage slidable longitudinally on said su port, a transverse shaft onsaid carriage, a sleeve pivotally mounted on said shaft, two pairs ofsheaves revoluble on said shaft and located on opposite sides of saidsleeve, dipper slidable in the sleeve, a sheave at each end of saiddipper arm, means to move the carriage on sa1d support, a pair-ofcables, each cable being attached to the outer end of the boom andarranged to pass over one of the sheaves slidable longitudinally Withinsaid boom and between said guides, said carriage consisting of-a pair ofinner beams and a pair of outer beams, said beams being spaced apart andrigidly connected at their ends, a shaft passing transversely throughsaid beams, a sleeve pivoted upon said shaft'and adapted to oscillatebetween the inner beams of the carriage, a pair of independentlyrevoluble sheaves mounted on said shaft between each outer beam and theinner beam adjacent thereto, a dipper arm slidable in said sleeve, asheave at each end of the dipper arm, means to move the carriage on saidboom, a pair of cables, each cable being attached near the outer end ofthe boom and arranged to pass over one of the sheaves on said dipper armand also over sheayes on opposite sides of said sleeve, and means towind in and pay out said cables, whereby said dipper arm may, be shiftedlongitudinally from any position of the carriage.

Whereof, I have hereunto subscribedmy name to this specification.

DAN

